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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
How To Choose Hollow Section Manufacturer in China
Release time：
2025-08-14
When choosing a Hollow Section manufacturer in China, multiple factors such as technical capabilities, quality systems, and supply chain stability need to be comprehensively considered. The following are the key selection steps based on industry practice and supplier analysis:
I. Core screening criteria
1. Certification and compliance
• International Certifications:
Give priority to manufacturers with ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and industry-specific certifications (such as ASTM A500, EN10210/10219) to ensure that the products comply with building or industrial standards.
• Special qualifications:
such as CE (EU), BV (Bureau Veritas Certification), LEED (Green Building), etc., reflect the manufacturer's adaptability to international standards.
2. Technical capabilities and customization
• Production flexibility:
◦Size customization: such as outer diameter (10×10mm to 1200×1200mm), wall thickness (0.5-60mm), length (up to 26.5 meters), etc.
◦ Process options: Supports ERW (Resistance Welding), LSAW (Straight seam Submerged arc Welding), cold bending forming and other processes to meet different strength requirements.
• Surface treatment:
Options such as spray painting, hot-dip galvanizing, and oil coating are available to adapt to corrosive environments or aesthetic requirements.
3. Quality Assurance System
• Testing capabilities:
Select manufacturers equipped with CNAS-certified laboratories to support raw material traceability, weld strength testing, dimensional tolerance control (±0.1mm), etc.
• Quality control process:
such as third-party inspection reports, full inspection rate of finished products (some manufacturers can achieve a 99% pass rate), to avoid batch defects.
II. Supply chain and capacity assessment
1. Capacity scale
• Large-scale：
Large-scale manufacturers with high annual production capacity, supporting bulk orders; Small and medium-sized manufacturers are more suitable for small-batch customization.
• Production lines and factory distribution：
Confirm the number of production lines and factory distribution (multi-factory collaboration) to ensure the stability of delivery.
2. Response speed and logistics
• Response time:
Manufacturers respond to inquiries promptly, shortening the decision-making cycle.
• Delivery cycle:
7 to 30 days for standard orders. Express delivery is available for urgent needs
3. Global service experience
Give priority to suppliers who have cooperated on international projects (such as national Bridges and buildings) and are familiar with export procedures and standards.
III. Supplier on-site verification
1. Factory audit
• Advanced Technology:
Inspect the production equipment (such as 500×500 direct forming machines), the degree of automation (full-process numerical control), and assess the technological advancement.
• Supply Chain:
Check the warehousing capacity (such as a 200,000-square-meter factory area) and raw material inventory (such as Q235 low-carbon steel) to avoid supply chain disruptions.
2. Samples and trial orders
• Free sample policy:
Most manufacturers support free samples, but they need to bear the shipping cost.
• Small-batch trial production:
Test consistency through MOQ (minimum order quantity, usually 2 tons), and then expand cooperation.
IV. Risk aversion strategy
1. Law and Contract
• Intellectual Property Rights:
Clearly define the ownership of intellectual property rights (especially for ODM designs) and require a confidentiality agreement (NDA).
• Payment terms:
Payment is made through a T/T+ letter of credit combination (such as a 30% deposit +70% to be paid before shipment), which reduces transaction risks.
2. Alternative supplier layout
• Procure by region:
Procure by region in a decentralized manner
Summary suggestions
1.Preferred options:
Vendors with annual revenue exceeding $50M, complete certifications (ISO+EN/ASTM), full customization support, and short response times.
2.Pitfalls Avoidance Tips:
Avoid manufacturers without the ability to trace raw materials;
Be cautious about quotations with MOQ lower than the industry standard (such as < 1 ton), as there may be cutting corners.
Through the systematic screening of the above dimensions, reliable partners that meet the project requirements can be efficiently matched. It is recommended to request samples and conduct on-site inspections for the final decision.
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Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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